US7179624B2 - Eco friendly process for the preparation of chiral alcohols by asymmetric reduction of prochiral ketones in water using soaked Phaseolus aureus L (green grams) - Google Patents
Eco friendly process for the preparation of chiral alcohols by asymmetric reduction of prochiral ketones in water using soaked Phaseolus aureus L (green grams) Download PDFInfo
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- US7179624B2 US7179624B2 US10/395,885 US39588503A US7179624B2 US 7179624 B2 US7179624 B2 US 7179624B2 US 39588503 A US39588503 A US 39588503A US 7179624 B2 US7179624 B2 US 7179624B2
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- 0 [1*]C([2*])O Chemical compound [1*]C([2*])O 0.000 description 2
- MEXAUSUJXHMJIB-CALJPSDSSA-N O=C(/C=C/C1=CC=CC=C1)C1=CC=CC=C1.O=C1CCCC2=CC=CC=C12 Chemical compound O=C(/C=C/C1=CC=CC=C1)C1=CC=CC=C1.O=C1CCCC2=CC=CC=C12 MEXAUSUJXHMJIB-CALJPSDSSA-N 0.000 description 1
- YVRQODFKFKHCPI-UHFFFAOYSA-N OC(CCC1=CC=CC=C1)C1=CC=CC=C1 Chemical compound OC(CCC1=CC=CC=C1)C1=CC=CC=C1 YVRQODFKFKHCPI-UHFFFAOYSA-N 0.000 description 1
- JAAJQSRLGAYGKZ-UHFFFAOYSA-N OC1CCCC2=CC=CC=C21 Chemical compound OC1CCCC2=CC=CC=C21 JAAJQSRLGAYGKZ-UHFFFAOYSA-N 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P41/00—Processes using enzymes or microorganisms to separate optical isomers from a racemic mixture
- C12P41/002—Processes using enzymes or microorganisms to separate optical isomers from a racemic mixture by oxidation/reduction reactions
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P7/00—Preparation of oxygen-containing organic compounds
- C12P7/02—Preparation of oxygen-containing organic compounds containing a hydroxy group
- C12P7/22—Preparation of oxygen-containing organic compounds containing a hydroxy group aromatic
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
Definitions
- the present invention relates to a new eco-friendly process for the preparation of chiral alcohols by asymmetric reduction of prochiral ketones in water using soked phaseolus aureus L (green grams).
- Chiral alcohols are well known intermediates having good demand as precursors in the development of pharmaceutically important drugs and agrochemicals. Key intermediates can be obtained by resolution of the recemate by chemical as well as by biochemical methods. In procedures which involve resolution of the racemate there is always 50% of the unwanted enantiomer. Hence, it is important to develop methods of asymmetric synthesis which do not allow for the formation of the unwanted enantiomer (50%). Asymmetric reduction of prochiral ketones to give a single enantiomer is one solution to this problem.
- Asymmetric reduction of prochiral ketones by chemical methods involve use of expensive chiral reagents.
- Biocatalytic approach is the most suitable method for preparation of a wide range of chiral alcohols.
- Baker's yeast is by far the most widely used microorganism for reduction of prochiral ketones to the corresponding optically active alcohols.
- recovery of desired product from emulsion is cumbersome and at times use of costly co-factors become necessary. These co-factors have to be subsequently regenarated.
- Plant cell cultures represent an important potential to perform biochemical reaction on organic compounds. Most of these reactions so for, have been confined to the biotransformation of secondary metabolites produced by plant cell. There have been a few examples of the biotransformation of synthetically important foreign substrates ( Tetrahedron Asymmetry 1996, 7, 1571).
- phaseolus aureus L green grams
- phaseolus mungo L black grams
- cicer arietinum L bengal grams
- the main object of the invention is to provide a process for obtaining chiral alcohol with high enantiomeric excess in good yields and amenable for scale up operation due to ease of work up.
- R 1 represents methyl and R 2 represents phenyl, substituted phenyl or benzyl, 1-naphthalenol of the formula (IV)
- the present invention provides a new eco-friendly process for the preparation of chiral alcohols, with high enantiomeric excess and good yields, which comprises soaking of the phaseolus aureus L (green grams) in water, reacting the prochiral ketones with the soaked phaseolus aureus L (green grams) in water, filtering the contents, extraction of the chiral alcohol into an organic solvent and its isolation through column chromatography.
- phaseolus aureus L (green grams) was soaked in deionised water for a period in the range of 20–25 hr.
- prochiral ketones were reacted with the soaked phaseolus aureus L (green grams) in water using a shaker for agitation for a period in the range of 20–50 hr at a temperature in the range of 14–30° C.
- Washed phaseolus aureus L (green grams) (50–500 g.) were taken into a conical flask and allowed to soak in deionised water (400 ml) for a period in the range of 20–25 hr.
- Prochiral ketone 500 mg–5 g was added to the soaked phaseolus aureus L (green grams) in the above water, covered and allowed to shake for a period in the range of 24–50 hr at a temperature in the range 14–30° C. Then, the green grams were filtered off and washed with deionised water.
- Washed phaseolus aureus L (green grams) 50 g. were taken into a conical flask and allowed to soak in deionised water (400 ml) for a period of 24 hr. Acetophenone (0.500 g; 0.004 moles) I(a) was added to the soaked phaseolus aureus L (green grams) in the above water, covered and allowed to shake for 24 hr at 15–20° C. Then the green grams were filtered off and washed with deionised water (3 ⁇ 100 ml). The combined filtrate was extracted with chloroform (3 ⁇ 500 ml). The chloroform layer was dried and the crude product obtained (360 mg). Pure 1-phenyl-(1S)-ethan-1-ol II(a) was obtained after column chromatography with silica gel using chloroform as eluent.
- Washed phaseolus aureus L (green grams) 50 g. were taken into a conical flask and allowed to soak in deionised water (400 ml) for a period of 24 hr. 4-chloroacetophenone (0.500 g; 0.0032 moles) I(b) was added to the soaked phaseolus aureus L (green grams) in the above water, covered and allowed to shake for 24 hr at 15–20° C. Then the green grams were filtered off and washed with deionised water (3 ⁇ 100 ml). The combined filtrate was extracted with chloroform (3 ⁇ 500 ml). The chloroform layer was dried and the crude product obtained (340 mg). Pure 1-(4-chlorophenyl-(1S)-ethan-1-ol II(b) was obtained after column chromatography with silica gel using chloroform as eluent.
- Washed phaseolus aureus L (green grams) 50 g. were taken into a conical flask and allowed to soak in deionised water (400 ml) for a period of 24 hr. 4-methylacetophenone (0.500 g; 0.0037 moles) I(c) was added to the soaked phaseolus aureus L (green grams) in the above water, covered and allowed to shake for 24 hr at 15–20° C. Then the green grams were filtered off and washed with deionised water (3 ⁇ 100 ml). The combined filtrate was extracted with chloroform (3 ⁇ 500 ml). The chloroform layer was dried and the crude product obtained (340 mg). Pure 1-(4-methylphenyl-(1S)-ethan-1-ol II(c) was obtained after column chromatography with silica gel using chloroform as eluent;
- Washed phaseolus aureus L (green grams) 50 g. were taken into a conical flask and allowed to soak in deionised water (400 ml) for a period of 24 hr. Phenylacetone (0.500 g; 0.0037 moles) I(d) was added to the soaked phaseolus aureus L (green grams) in the above water, covered and allowed to shake for 24 hr at 15–20° C. Then the green grams were filtered off and washed with deionised water (3 ⁇ 100 ml). The combined filtrate was extracted with chloroform (3 ⁇ 500 ml). The chloroform layer was dried and the crude product obtained (330 mg). Pure 1-phenyl-(2S)-propan-2-ol II(d) was obtained after column chromatography with silica gel using chloroform as eluent.
- Washed phaseolus aureus L (green grams) 50 g. were taken into a conical flask and allowed to soak in deionised water (400 ml) for a period of 24 hr.
- 1-naphthalenone (0.500 g; 0.0034 moles) III was added to the soaked phaseolus aureus L (green grams) in the above water, covered and allowed to shake for 46 hr at 15–20° C. Then the green grams were filtered off and washed with deionised water (3 ⁇ 100 ml). The combined filtrate was extracted with chloroform (3 ⁇ 500 ml). The chloroform layer was dried and the crude product obtained (480 mg). Pure (1S)-1,2,3,4-tetrahydro-1-naphthalenol (IV) was obtained after column chromatography with silica gel using chloroform as eluent.
- Washed phaseolus aureus L (green grams) 50 g. were taken into a conical flask and allowed to soak in deionised water (400 ml) for a period of 24 hr.
- Chalcone (0.500 g; 0.0024 moles) (V) was added to the soaked phaseolus aureus L (green grams) in the above water, covered and allowed to shake for 24 hr at 15–20° C. Then the green grams were filtered off and washed with deionised water (3 ⁇ 100 ml). The combined filtrate was extracted with chloroform (3 ⁇ 500 ml). The chloroform layer was dried and the crude product obtained (240 mg). Pure 1,3-diphenyl-(1S)-propan-1-ol (VI) was obtained after column chromatography with silica gel using chloroform as eluent.
- Washed phaseolus aureus L 500 g. were taken into a conical flask and allowed to soak in deionised water (4 L) for a period of 24 hr.
- Acetophenone (5 g; 0.0416 moles) I(a) was added to the soaked phaseolus aureus L (green grams) in the above water, covered and allowed to shake for 24 hr at room temperature (28° C). Then the green grams were filtered off and washed with deionised water (5 ⁇ 600 ml). The combined filtrate was extracted with chloroform (30 ⁇ 500 ml). The chloroform layer was dried and the crude product obtained (3.21 g.). Pure 1-phenyl-(1S)-ethan-1-ol II(a) was obtained after column chromatography with silica gel using chloroform as eluent.
- Washed phaseolus mungo L black grams 50 g. were taken into a conical flask and allowed to soak in deionised water (400 ml) for a period of 24 hr. Acetophenone (0.500 g; 0.004 moles) I(a) was added to the soaked phaseolus mungo L (black grams) in the above water, covered and allowed to shake for 24 hr at room temperature (28° C). Then the black grams were filtered off and washed with deionised water (3 ⁇ 100 ml). The combined filtrate was extracted with chloroform (3 ⁇ 500 ml). The chloroform layer was dried and the crude product obtained (0.1 g.). Pure 1-phenyl-(1S)-ethan-1-ol II(a) was obtained after column chromatography with silica gel using chloroform as eluent.
- Washed cicer arietinum L 50 g. were taken into a conical flask and allowed to soak in deionised water (400 ml) for a period of 24 hr. Acetophenone (0.500 g; 0.004 moles) I(a) was added to the soaked cicer arietinum L (bengal grams) in the above water, covered and allowed to shake for 24 hr at room temperature (28° C). Then the green grams were filtered off and washed with deionised water (3 ⁇ 100 ml). The combined filtrate was extracted with chloroform (3 ⁇ 500 ml). The chloroform layer was dried and the crude product obtained (80 mg.). Pure 1-phenyl-(1S)-ethan-1-ol II(a) was obtained after column chromatography with silica gel using chloroform as eluent.
- Phaseolus aureus L green gram used as biocatalyst is easily available.
- phaseolus aureus L green gram
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Abstract
The present invention relates to a new eco-friendly process for the preparation of chiral alcohols by asymmetric reduction of prochiral ketones in water using soked phaseolus aureus L (green grams).
Description
The present invention relates to a new eco-friendly process for the preparation of chiral alcohols by asymmetric reduction of prochiral ketones in water using soked phaseolus aureus L (green grams).
Chiral alcohols are well known intermediates having good demand as precursors in the development of pharmaceutically important drugs and agrochemicals. Key intermediates can be obtained by resolution of the recemate by chemical as well as by biochemical methods. In procedures which involve resolution of the racemate there is always 50% of the unwanted enantiomer. Hence, it is important to develop methods of asymmetric synthesis which do not allow for the formation of the unwanted enantiomer (50%). Asymmetric reduction of prochiral ketones to give a single enantiomer is one solution to this problem.
Asymmetric reduction of prochiral ketones by chemical methods involve use of expensive chiral reagents. Biocatalytic approach is the most suitable method for preparation of a wide range of chiral alcohols. Baker's yeast is by far the most widely used microorganism for reduction of prochiral ketones to the corresponding optically active alcohols. Here, recovery of desired product from emulsion is cumbersome and at times use of costly co-factors become necessary. These co-factors have to be subsequently regenarated.
Plant cell cultures represent an important potential to perform biochemical reaction on organic compounds. Most of these reactions so for, have been confined to the biotransformation of secondary metabolites produced by plant cell. There have been a few examples of the biotransformation of synthetically important foreign substrates (Tetrahedron Asymmetry 1996, 7, 1571).
Baldassarre et al., have reported the use of whole plant cell for the asymmetric reduction of prochiral ketones (J. Mol. Catal. B: Enzym. 2000, 11, 55–58). Use of immobilized plant cell cultures as potential biocatalyst for the transformation of synthetically important foreign substrate was also investigated (Phytochemistry 1991, 30, 3595, Phytochemistry 1994, 35, 661).
In our attempts to produce chiral alcohols in high enantiomeric excess and high yield, we have investigated several soaked edible grams as potential biocatalysts for the asymmetric reduction of prochiral ketones. We found for the first time that the soaked phaseolus aureus L (green grams) could be effectively used as biocatalyst for the asymmetric reduction of prochiral ketones to obtain chiral alcohols in moderate yields with good enantiomeric selectivity, whereas phaseolus mungo L (black grams) and cicer arietinum L (bengal grams) gave low enantioselectivity with a negligable yield.
The main object of the invention is to provide a process for obtaining chiral alcohol with high enantiomeric excess in good yields and amenable for scale up operation due to ease of work up.
It is another object of the invention to provide a process for the production of chiral alcohol wherein the isolation of the product is easy with no slush formation.
It is a further object of the invention to provide a process for the production of chiral alcohol using Phaseolus aureus L (green gram) as easily available biocatalyst.
It is yet another object of the invention to provide an eco-friendly process in which the soaked phaseolus aureus L (green gram) can be used as manure after reaction.
The above objects of the invention are achieved by a process to prepare chiral alcohols of the formula (II)
where R1 represents methyl and R2 represents phenyl, substituted phenyl or benzyl, 1-naphthalenol of the formula (IV)
and 1,3-diphenyl propan-1-ol of the formula (VI)
by the use of soaked vigna radiata (green grams) as biocatalyst in the asymmetric reduction of prochiral ketones of the formula (I) wherein R1 and R2 have the same meaning as
mentioned above; 1-naphthalenone of the formula (III) and chalcone of the formula (V)
Accordingly, the present invention provides a new eco-friendly process for the preparation of chiral alcohols, with high enantiomeric excess and good yields, which comprises soaking of the phaseolus aureus L (green grams) in water, reacting the prochiral ketones with the soaked phaseolus aureus L (green grams) in water, filtering the contents, extraction of the chiral alcohol into an organic solvent and its isolation through column chromatography.
In an embodiment of the present invention phaseolus aureus L (green grams) was soaked in deionised water for a period in the range of 20–25 hr.
In another embodiment of the present invention prochiral ketones were reacted with the soaked phaseolus aureus L (green grams) in water using a shaker for agitation for a period in the range of 20–50 hr at a temperature in the range of 14–30° C.
Washed phaseolus aureus L (green grams) (50–500 g.) were taken into a conical flask and allowed to soak in deionised water (400 ml) for a period in the range of 20–25 hr. Prochiral ketone (500 mg–5 g) was added to the soaked phaseolus aureus L (green grams) in the above water, covered and allowed to shake for a period in the range of 24–50 hr at a temperature in the range 14–30° C. Then, the green grams were filtered off and washed with deionised water.
The combined filtrate was extracted with an organic solvent. Organic layer was washed, dried and the crude product isolated. Pure chiral alcohol was obtained with high enantiomeric excess after column chromatography with silica gel using chloroform as eluant.
The following examples are given by way of illustration of the present invention and therefore should not be construed to limit the scope of the present invention.
Washed phaseolus aureus L (green grams) 50 g. were taken into a conical flask and allowed to soak in deionised water (400 ml) for a period of 24 hr. Acetophenone (0.500 g; 0.004 moles) I(a) was added to the soaked phaseolus aureus L (green grams) in the above water, covered and allowed to shake for 24 hr at 15–20° C. Then the green grams were filtered off and washed with deionised water (3×100 ml). The combined filtrate was extracted with chloroform (3×500 ml). The chloroform layer was dried and the crude product obtained (360 mg). Pure 1-phenyl-(1S)-ethan-1-ol II(a) was obtained after column chromatography with silica gel using chloroform as eluent.
Yield: 0.255 g, 50%; ee: 84%; ([∝]25 D=−37.8°, c=1, methanol)
Washed phaseolus aureus L (green grams) 50 g. were taken into a conical flask and allowed to soak in deionised water (400 ml) for a period of 24 hr. 4-chloroacetophenone (0.500 g; 0.0032 moles) I(b) was added to the soaked phaseolus aureus L (green grams) in the above water, covered and allowed to shake for 24 hr at 15–20° C. Then the green grams were filtered off and washed with deionised water (3×100 ml). The combined filtrate was extracted with chloroform (3×500 ml). The chloroform layer was dried and the crude product obtained (340 mg). Pure 1-(4-chlorophenyl-(1S)-ethan-1-ol II(b) was obtained after column chromatography with silica gel using chloroform as eluent.
Yield: 0.253 g, 50%; ee: 89.76%; ([∝]25 D=−38.6°, c=1, chloroform).
Washed phaseolus aureus L (green grams) 50 g. were taken into a conical flask and allowed to soak in deionised water (400 ml) for a period of 24 hr. 4-methylacetophenone (0.500 g; 0.0037 moles) I(c) was added to the soaked phaseolus aureus L (green grams) in the above water, covered and allowed to shake for 24 hr at 15–20° C. Then the green grams were filtered off and washed with deionised water (3×100 ml). The combined filtrate was extracted with chloroform (3×500 ml). The chloroform layer was dried and the crude product obtained (340 mg). Pure 1-(4-methylphenyl-(1S)-ethan-1-ol II(c) was obtained after column chromatography with silica gel using chloroform as eluent;
Yield: 0.254 g, 50%; ee: 94.54%; ([∝]25 D=−48.5°, c=1, chloroform).
Washed phaseolus aureus L (green grams) 50 g. were taken into a conical flask and allowed to soak in deionised water (400 ml) for a period of 24 hr. Phenylacetone (0.500 g; 0.0037 moles) I(d) was added to the soaked phaseolus aureus L (green grams) in the above water, covered and allowed to shake for 24 hr at 15–20° C. Then the green grams were filtered off and washed with deionised water (3×100 ml). The combined filtrate was extracted with chloroform (3×500 ml). The chloroform layer was dried and the crude product obtained (330 mg). Pure 1-phenyl-(2S)-propan-2-ol II(d) was obtained after column chromatography with silica gel using chloroform as eluent.
Yield: 0.232 g, 45.67%; ee: 97.86%; ([∝]25 D=+32.62°, c=1, chloroform).
Washed phaseolus aureus L (green grams) 50 g. were taken into a conical flask and allowed to soak in deionised water (400 ml) for a period of 24 hr. 1-naphthalenone (0.500 g; 0.0034 moles) III was added to the soaked phaseolus aureus L (green grams) in the above water, covered and allowed to shake for 46 hr at 15–20° C. Then the green grams were filtered off and washed with deionised water (3×100 ml). The combined filtrate was extracted with chloroform (3×500 ml). The chloroform layer was dried and the crude product obtained (480 mg). Pure (1S)-1,2,3,4-tetrahydro-1-naphthalenol (IV) was obtained after column chromatography with silica gel using chloroform as eluent.
Yield: 0.259 g, 51%; ee: 98.43%; ([∝]25 D=+31.5°, c=1, chloroform).
Washed phaseolus aureus L (green grams) 50 g. were taken into a conical flask and allowed to soak in deionised water (400 ml) for a period of 24 hr. Chalcone (0.500 g; 0.0024 moles) (V) was added to the soaked phaseolus aureus L (green grams) in the above water, covered and allowed to shake for 24 hr at 15–20° C. Then the green grams were filtered off and washed with deionised water (3×100 ml). The combined filtrate was extracted with chloroform (3×500 ml). The chloroform layer was dried and the crude product obtained (240 mg). Pure 1,3-diphenyl-(1S)-propan-1-ol (VI) was obtained after column chromatography with silica gel using chloroform as eluent.
Yield: 0.141 g, 28%; ee: 85.62%; ([∝]25 D=+28°, c=1, dichloromethane)
Washed phaseolus aureus L (green grams) 500 g. were taken into a conical flask and allowed to soak in deionised water (4 L) for a period of 24 hr. Acetophenone (5 g; 0.0416 moles) I(a) was added to the soaked phaseolus aureus L (green grams) in the above water, covered and allowed to shake for 24 hr at room temperature (28° C). Then the green grams were filtered off and washed with deionised water (5×600 ml). The combined filtrate was extracted with chloroform (30×500 ml). The chloroform layer was dried and the crude product obtained (3.21 g.). Pure 1-phenyl-(1S)-ethan-1-ol II(a) was obtained after column chromatography with silica gel using chloroform as eluent.
Yield: 2.08 g, 40%; ee: 71.44%; ([∝]25 D=−32.13°, c=1, methanol).
Washed phaseolus mungo L (black grams) 50 g. were taken into a conical flask and allowed to soak in deionised water (400 ml) for a period of 24 hr. Acetophenone (0.500 g; 0.004 moles) I(a) was added to the soaked phaseolus mungo L (black grams) in the above water, covered and allowed to shake for 24 hr at room temperature (28° C). Then the black grams were filtered off and washed with deionised water (3×100 ml). The combined filtrate was extracted with chloroform (3×500 ml). The chloroform layer was dried and the crude product obtained (0.1 g.). Pure 1-phenyl-(1S)-ethan-1-ol II(a) was obtained after column chromatography with silica gel using chloroform as eluent.
Yield: 0.020 g, 4%; ee: 23.11%; ([∝]25 D=−10.4°, c=1, methanol).
Washed cicer arietinum L (bengal grams) 50 g. were taken into a conical flask and allowed to soak in deionised water (400 ml) for a period of 24 hr. Acetophenone (0.500 g; 0.004 moles) I(a) was added to the soaked cicer arietinum L (bengal grams) in the above water, covered and allowed to shake for 24 hr at room temperature (28° C). Then the green grams were filtered off and washed with deionised water (3×100 ml). The combined filtrate was extracted with chloroform (3×500 ml). The chloroform layer was dried and the crude product obtained (80 mg.). Pure 1-phenyl-(1S)-ethan-1-ol II(a) was obtained after column chromatography with silica gel using chloroform as eluent.
Yield : 0.010 g, 2%; ee: 8%; ([∝]25 D=−3.6°, c=1, methanol).
The Main Advantages of the Present Invention are
1) The process produced chiral alcohol with high enantiomeric excess in good yields and amenable for scale up operations since workup and isolation of the product is easy with no slush formation.
2) Phaseolus aureus L (green gram) used as biocatalyst is easily available.
3) The process is ecofriendly and the soaked phaseolus aureus L (green gram) can be used as manure after reaction.
Claims (6)
1. A process for the preparation of a chiral alcohol comprising:
soaking Phaseolus aureus L in deionized water for a period ranging from 20–25 hours prior to reaction with a prochiral ketone,
reacting the prochiral ketone with Phaseolus aureus L soaked in water to form a reaction mixture,
filtering the reaction mixture,
extracting chiral alcohol produced thereby into an organic solvent, and
isolating the chiral alcohol so obtained.
2. A process as claimed in claim 1 wherein the isolation is carried out by column chromatography.
3. A process as claimed in claim 1 wherein the prochiral ketone is reacted with the Phaseolus aureus L soaked in water using a shaker for agitation for a period in the range of 20–50 hrs at a temperature in the range of 14–30° C.
4. A process as claimed in claim 1 wherein the prochiral ketone used is selected from the group consisting of acetophenone, 4-chloroacetophenone, 4-methylacetophenone, phenylacetone, 1, 2, 3, 4-tetrahydro-1-naphthalenone and chalcone.
5. A process as claimed in claim 1 wherein the chiral alcohol is (1S) 1,2,3,4-tetrahydro-1-naphthalenol.
6. A process as claimed in claim 1 wherein the organic solvent used for extraction of the chiral alcohol comprises chloroform.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/395,885 US7179624B2 (en) | 2003-03-25 | 2003-03-25 | Eco friendly process for the preparation of chiral alcohols by asymmetric reduction of prochiral ketones in water using soaked Phaseolus aureus L (green grams) |
| PCT/IN2003/000106 WO2004087629A1 (en) | 2003-03-25 | 2003-03-31 | Eco-friendly process for the preparation of chiral alcohols by asymmetric reduction of prochiral ketones |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/395,885 US7179624B2 (en) | 2003-03-25 | 2003-03-25 | Eco friendly process for the preparation of chiral alcohols by asymmetric reduction of prochiral ketones in water using soaked Phaseolus aureus L (green grams) |
| PCT/IN2003/000106 WO2004087629A1 (en) | 2003-03-25 | 2003-03-31 | Eco-friendly process for the preparation of chiral alcohols by asymmetric reduction of prochiral ketones |
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| CN102146020B (en) * | 2010-02-10 | 2013-09-18 | 吉林大学 | Method for synthesizing 1,3-diphenyl-1-propanol compound |
| DE102011114780A1 (en) * | 2011-10-01 | 2013-04-04 | Merck Patent Gmbh | Use of propanol and propenol derivatives as antioxidants |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6218581B1 (en) * | 1997-12-29 | 2001-04-17 | Sanyo Shokuhin Co., Ltd. | Process of producing optically active alcohol |
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2003
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|---|---|---|---|---|
| US6218581B1 (en) * | 1997-12-29 | 2001-04-17 | Sanyo Shokuhin Co., Ltd. | Process of producing optically active alcohol |
Non-Patent Citations (3)
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| Cheanyeh et al, "Glucose Metabolism and Bioreduction of 2-butanone by Candida Utilis Studied by Means of Ion-Exchange Chromatography", Journal of Chromatography A, Elsevier Science, NL., vol. 763, No. 1-2, 28 Feb. 28, 1997, pp. 205-211, XP004116736. |
| Giri et al, "Biotransformations Using Plant Cells, Organ Cultures and Enzyme Systems: Current Trends and Future Prospects", Biotechnology Advances, Elsevier, Publishing, Barking, GB, vol. 19, No. 3, Jun. 2001, pp. 175-199. |
| Nakamura et al., "Cyanobacterium-catalyzed Asymmetric Reduction of Ketones", Tetrahedron Letters, Elsevier Science Publishers, Amsterdam, NL, vol. 41, No. 35, Aug. 2000, pp. 6799-6802, XP004213952. |
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| WO2004087629A1 (en) | 2004-10-14 |
| US20040191879A1 (en) | 2004-09-30 |
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